Display screen or portion thereof with animated graphical user interface



FIG. 1 is a front view of a display screen or portion thereof with an animated graphical user interface;

FIG. 2 is a second image thereof; and,

FIG. 3 is a third image thereof.

The broken lines showing the display screen or portion thereof forms no part of the claimed design.

The appearance of the animated graphical user interface sequentially transitions between the images shown in FIGS. 1-3 . The process or period in which one image transitions to another image forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with an animated graphical user interface, as shown and described. 